/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * See LICENSE.txt included in this distribution for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at LICENSE.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2018, Chris Fraire <cfraire@me.com>.
 */

package org.opengrok.indexer.analysis.executables;

import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

/**
 * Represents a package-private container for {@link StringWriter} instances
 * used when aggregating content for a jar's class files for the jar's indexed
 * fields.
 */
class JFieldBuilder {
    private final Map<String, StringWriter> fieldBuilders = new HashMap<>();

    boolean hasField(String fieldName) {
        return fieldBuilders.containsKey(fieldName);
    }

    StringWriter write(String fieldName) {
        StringWriter res = fieldBuilders.getOrDefault(fieldName, null);
        if (res != null) {
            return res;
        }
        res = new StringWriter();
        fieldBuilders.put(fieldName, res);
        return res;
    }
}
